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Finding the Fourth Proportional to 36,879.64, 55,302.16 and 13,489.72

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Solution

The fourth proportional to 36,879.64, 55,302.16 and 13,489.72 is: 20,228.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,879.64 : 55,302.16 = 13,489.72 : x
  2. Step 2: Convert to fraction form
    36,879.64/55,302.16 = 13,489.72/x
  3. Step 3: Cross multiply
    36,879.64x = 55,302.16 × 13,489.72
  4. Step 4: Simplify right side
    36,879.64x = 746,010,653.80
  5. Step 5: Solve for x
    x = 746,010,653.80/36,879.64
  6. Step 6: Final answer
    x = 20,228.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.